hg: jdk-updates/jdk11u-dev: 8235829: graal crashes with Zombie.java test

[goetz.lindenmaier at sap.com]

Changeset: 6a6c7fbdef64
Author:    coleenp
Date:      2019-12-18 11:51 -0500
URL:       https://hg.openjdk.java.net/jdk-updates/jdk11u-dev/rev/6a6c7fbdef64

8235829: graal crashes with Zombie.java test
Summary: Start ServiceThread before compiler threads, and run nmethod barriers for zgc before adding to the service thread queues, or posting events from the java thread.
Reviewed-by: pliden, dholmes, rehn

! src/hotspot/share/code/nmethod.cpp
! src/hotspot/share/prims/jvmtiCodeBlobEvents.cpp
! src/hotspot/share/prims/jvmtiImpl.cpp
! src/hotspot/share/runtime/serviceThread.cpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/services/management.cpp
! test/hotspot/jtreg/serviceability/jvmti/CompiledMethodLoad/Zombie.java